CN102403926A

CN102403926A - Solar energy system and production method thereof

Info

Publication number: CN102403926A
Application number: CN2010102830263A
Authority: CN
Inventors: 李宗宪
Original assignee: Epistar Corp
Current assignee: Epistar Corp
Priority date: 2010-09-15
Filing date: 2010-09-15
Publication date: 2012-04-04

Abstract

The invention provides a solar energy system and a production method thereof. The solar energy system comprises a solar energy battery and an optical device arranged on the solar energy battery, wherein the optical device is provided with a cavity body. The cavity body accommodates a first fluid and a second fluid which are not immiscible with each other. An interface is arranged between the first fluid and the second fluid, and the normal direction of the interface changes along with the angle of incident light.

Description

Solar energy system and preparation method thereof

Technical field

The present invention relates to solar energy system, particularly relate to solar energy system that has by Optical devices and preparation method thereof.

Background technology

Flourishing now in science and technology, earth resource is supply human existence and activity just apace in the loss.For slowing down resource consumption and energy starved problem, the exploitation of the renewable energy resources is is just actively researched and developed in countries in the world.Under the drive of this one world's environmental protection and energy saving trend, the technology of utilizing natural resources to generate electricity by solar energy, wind energy, tidal energy, living mass-energy etc. is the emphasis of research now.Owing to solar energy has the characteristic of abundant supply, and the energy for cleaning, can not produce regeneration of contaminated, more there is not the back something lost that burns other natural resourcess and cause Global Greenhouse Effect, be a kind of " clean energy ", thereby researched and developed widely and utilize.

Present common device of solar generating.Because overall incident light irradiation energy is limited by the relative angle between flat solar module and the incident ray; Usually meeting is further installed a drive unit and is connected with an external power source; So; The angle of solar panels battery surface can appropriateness change cooperating moving of incident light source (like the sun), and then promote overall incident illumination energy.Yet this drive unit of adding increases building of system usually to be put and maintenance cost, and consumes additional electric energy dynamically to change the angle on solar module surface, improves the cost of electricity-generating of this type of device of solar generating.Therefore, how a kind of device of solar generating cheaply being provided is the problem of needing improvement badly.

Summary of the invention

The present invention provides a kind of solar energy system, comprises a solar cell; And Optical devices; Be disposed on the solar cell, Optical devices have a cavity, and cavity is equipped with an immiscible first fluid and one second fluid; Have an interface between the first fluid and second fluid, the normal direction at interface can change with the angle of incident ray.

The present invention also provides a kind of solar energy system, comprises a solar cell; One light collecting element is disposed on the solar cell; And an Optical devices array, being disposed on the light collecting element, the Optical devices array comprises a plurality of Optical devices; Each Optical devices has a cavity and relative two side walls; And relative two side walls are positioned at relative two sides of cavity, and cavity is equipped with an immiscible first fluid and one second fluid, have an interface between the first fluid and second fluid; The interface is the surface that a voltage can be modulated; And relative two side walls are two electrodes independent of each other, can have a voltage difference between two side walls, and the normal direction at interface can change with the change of voltage difference.

The present invention also provides a kind of manufacture method of solar energy system, and comprising provides a solar cell; And Optical devices are disposed on the solar cell; Optical devices have a cavity; Cavity is equipped with an immiscible first fluid and one second fluid, has an interface between the first fluid and second fluid, and the normal direction at interface changes with the angle of incident ray.

Description of drawings

Figure 1A～Figure 1B shows the profile of the solar energy system of one embodiment of the invention.

Fig. 2 A～Fig. 2 B shows the profile of the solar energy system of one embodiment of the invention.

Fig. 3 shows the profile of the solar energy system of another embodiment of the present invention.

Fig. 4 shows the profile of the solar energy system of further embodiment of this invention.

Fig. 5 shows the making flow chart of the solar energy system of one embodiment of the invention.

The reference numeral explanation

100～solar energy system;

110～solar cell;

112～plane of incidence;

120～Optical devices;

122～first fluid;

124～the second fluids;

126～box like structure;

126a～base plate;

126b～top board;

126c, 126d～side wall;

126e～hydrophobic dielectric materials layer;

200～solar energy system;

210～solar cell;

220～light collecting element;

222～incidence surface;

230～Optical devices array;

240～sun-following device;

242～current measuring element;

244～control element;

310～sun-following device;

410～sun-following device;

412～sun angle detector;

414～control element;

510,520,530,540～step;

A～normal direction;

C～cavity;

D～spacing;

F1, F2～surface;

L～sunlight;

N～current detection signal;

N1～angle signal;

S～interface;

V1～first voltage;

V2～second voltage;

V3～tertiary voltage;

V4～the 4th voltage;

ψ～inclination angle.

Embodiment

For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, hereinafter is special lifts a preferred embodiment, and is described with reference to the accompanying drawings as follows.

Below will specify the making and the occupation mode of the embodiment of the invention.It should be noted that so the present invention provides many inventive concepts of supplying usefulness, it can multiple specific pattern be implemented.The specific embodiment of discussing of giving an example in the literary composition is merely manufacturing and uses ad hoc fashion of the present invention, and is non-in order to limit scope of the present invention.In addition, in different embodiment, possibly use the label or the sign of repetition.These repeat to be merely simply clearly narrates the present invention, does not represent between the different embodiment that discussed and/or the structure to have any association.Moreover, when address one first element be positioned at one second element " on ", " on ", D score or " under " time, comprise that first element directly contacts with second element or be separated with the situation of one or more other elements.In the accompanying drawings, possibly exaggerate shape and the thickness so that clear of embodiment shows characteristic of the present invention.Moreover, hereinafter, with the element that describe to constitute apparatus of the present invention especially or with directly related element, the various forms that the not shown or element described then can those skilled in the art knows in the accompanying drawing exists.

The present invention proposes a kind of fixed solar energy system with solar tracking function; It is the effect that reaches solar tracking with the liquid microprism (1iquid micro-prism) that electrowetting technology is made; So needn't need with an external driver device (for example motor) like traditional solar energy system, the function that still can make solar energy system have solar tracking also can significantly be improved the generating efficiency of conventional fixed formula solar energy system.

Please with reference to Figure 1A and Figure 1B, in the present embodiment, a solar energy system 100 comprises a solar cell 110 and Optical devices 120, and wherein Optical devices 120 for example are an electric wetting prism (electro-wetting prism).Optical devices 120 are disposed on the solar cell 110.

The Optical devices 120 of present embodiment can have a first fluid 122, one second fluid 124 and a box like structure 126, and wherein the first fluid 122 and second fluid 124 do not dissolve each other.Box like structure 126 has a base plate 126a, a top board 126b and relative two

side wall

126c, 126d, and wherein relative two

side wall

126c, 126d are disposed on the base plate 126a, and top board 126b is disposed at relative two

side wall

126c, 126d is last.

Base plate 126a, relative two

side wall

126c, 126d and top board 126b define a cavity C, and the first fluid 122 and second fluid 124 are disposed among the cavity C, and have an interface S between the first fluid 122 and second fluid 124.The first fluid 122 and second fluid 124 can be respectively hydrophilic material (for example water, salt solution) and hydrophobic material (for example oil), or electric conducting material and insulating material, or are polar material and non-polar material.The first fluid 122 and second fluid 124 are all the fluid of printing opacity.The base plate 126a of box like structure 126 and top board 126b constitute (like glass) by transparent material.The relative two side wall 126c of box like structure 126,126d are respectively two electrodes independent of each other; The material of

side wall

126c, 126d for example is electric conducting material or semi-conducting material (for example silicon), and the space D between the two

side wall

126c, 126d for example is several microns to several millimeters.

Present embodiment is to utilize the wetting principle of electricity to change form (for example the inclination angle ψ of interface S or the normal direction A of interface S; Shown in Figure 1B); So that sunlight L can reflect and be radiated at a plane of incidence 112 of solar cell 110 by S through the interface, and then promote the generating efficiency of solar energy system 100.It should be noted that shown in Figure 1B in the present embodiment, " the inclination angle ψ " of interface S refers to the part angle with respect to the horizontal plane of the adjacent cavities body sidewall of interface S.Interface S " normal direction A " refers to the direction perpendicular to interface S.

Box like structure 126 also can have a hydrophobic dielectric materials layer 126e; Hydrophobic dielectric materials layer 126e covers surperficial F1, the F2 towards cavity C of

side wall

126c, 126d; The material of hydrophobic dielectric materials layer 126e for example is a fluoropolymer (fiuoropolymer), and the thickness of hydrophobic dielectric materials layer 126e for example is 1 micron.The Optical devices 120 of present embodiment are merely an exemplary structure of optical means, and in other embodiments, Optical devices also can be other prism structure.

In the present embodiment; Interface S is the surface that a voltage can be modulated; That is interface S can receive the voltage extent influence that puts on

side wall

126c, 126d and change kenel (for example make interface S be plane, concave surface or convex surface, or change normal direction A or the inclination angle ψ of interface S).Present embodiment can change the kenel of interface S according to circumstances.

For instance; Shown in Figure 1A; When sunlight L vertical irradiation solar energy system 100 (for example high noon), can apply one first voltage V1 and one second voltage V2 respectively to

side wall

126c, 126d, and make first fluid 122 and second fluid, 124 ground connection; So that there is one first voltage difference between the

side wall

126c, 126d, make interface S be a horizontal plane.Thus, sunlight L can vertically pass interface S and shine the plane of incidence 112 of solar cell 110.In the present embodiment, the first voltage V1 is equal to the second voltage V2, that is first voltage difference is 0.

Shown in Figure 1B; When the oblique irradiation of sunlight L solar energy system 100 (the for example morning or afternoon); Can apply a tertiary voltage V3 and one the 4th voltage V4 respectively to

side wall

126c, 126d; So that have one second voltage difference between the

side wall

126c, 126d, and second voltage difference can make interface S be an inclined plane (that is the angle of the normal direction of the normal direction A of interface S and horizontal plane is not 0).Thus, sunlight L can be through the interface S refraction and with haply perpendicular to the direction incident solar cell 110 of the plane of incidence 112 of solar cell 110, and then improve the generating efficiency of solar energy system 100.

Fig. 2 A～Fig. 2 B shows the profile of the solar energy system of another embodiment of the present invention.

Please with reference to Fig. 2 A and Fig. 2 B; The solar energy system 200 of present embodiment comprises a solar cell 210, a light collecting element 220 and an Optical devices array 230; Wherein Optical devices array 230 comprises a plurality of Optical devices 120, electrically independence or the electric connection each other of these Optical devices 120, that is; Can be the individually independent control of these Optical devices 120 or collective's control, and the kenel of the interface S of Optical devices 120 can be mutually the same or differ from one another.

Light collecting element 220 is disposed between solar cell 210 and the Optical devices array 230; So that the interface S of sunlight L through Optical devices 120 is after light collecting element 220 focuses on solar cell 210; Though the light collecting element 220 shown in the figure is a Fresnel prism (Fresnel Lens) (its can electric wetting mode make), also can use a reflecting cover of paraboloid as light collecting element.In other embodiments, light collecting element 220 can be the Optical devices array be made up of a plurality of Optical devices.At this moment; Can make the whole interface of Optical devices array have inclined-plane, convex surface, concave surface or aforesaid combination by the interface kenel of each Optical devices of adjusting the Optical devices array respectively or other are suitable for the surface configuration of optically focused; So that it can be equivalent to Fresnel prism; And can adjust the curvature of aforementioned convex surface or concave surface and the slope on aforementioned inclined-plane, and then reach the effect of the focal length of adjustment light collecting element 220 by the normal direction at the interface of each Optical devices of adjustment Optical devices array.In the present embodiment, Optical devices array 230 and light collecting element 220 are separated from one another does not directly contact.In other embodiments, Optical devices array 230 also can directly contact with light collecting element 220.

In one embodiment, solar energy system 200 for example is a deflection structure, and solar energy system 200 can be a plate-like structure.Therefore, can folding, splicing or the mode of coiling take in solar energy system 200.In another embodiment, solar energy system 200 for example is a rigid structure.

In the present embodiment, solar energy system 200 also can comprise a sun-following device (sun tracker), is suitable for by the kenel of each the interface S that adjusts Optical devices array 230 sunlight L being advanced towards solar cell 210.Polytype sun-following device of below giving an example, but only in order to illustrate, be not in order to limit the present invention.

Please with reference to Fig. 2 A and Fig. 2 B; In one embodiment; Sun-following device 240 comprises a current measuring element 242 and a control element 244; Wherein current measuring element 242 couples solar cell 210, with the electric current that detects solar cell 210 and produce the size of a current detection signal N with the expression electric current.

Control element 244 couples current measuring element 242 and Optical devices array 230, with received current detection signal N and control the normal direction of the interface S of Optical devices array 230.Under the situation that solar incident angle is fixed, the size of electric current can change with the change of normal direction.Therefore; Normal direction when control element 244 can obtain electric current via repeatedly modulating this normal direction and is maximum also maintains above-mentioned normal direction as final normal direction, so that the electric current of solar cell 210 maintains maximum with the normal direction of interface S according to this.Control element 244 can fixing or unfixed time interval (for example 10 minutes, 30 minutes, 1 hour) afterwards, repeat aforesaid action to regain a final normal direction, so that the electric current of solar cell 210 maintains maximum.

Please with reference to Fig. 3, the sun-following device 310 of this embodiment couples Optical devices array 230, and according to the normal direction of the track of sun adjustment interface S that pre-records so that sunlight L through the interface S refraction and irradiation solar cell 210.Aforementioned track of sun of pre-recording can be pre-record before the sun-following device 310 itself or pre-record with other sun angle detector.

Please with reference to Fig. 4, the sun-following device 410 of this embodiment comprises a sun angle detector 412 and a control element 414.Sun angle detector 412 is suitable for detecting the angle of the sun and produces the angle of an angle signal N1 with the expression sun.Control element 414 can be adjusted the normal direction of interface S according to angle signal N1 so that sunlight L can be through the interface S refraction and with haply perpendicular to the direction incident light collecting element 220 of the incidence surface 222 of light collecting element 220.

Please, at first, a solar cell (step 510) is provided with reference to Fig. 5.Afterwards, optionally a light collecting element is disposed on the aforementioned solar cell (step 520), and with an Optical devices array configurations on aforementioned light collecting element (step 530).Then, a sun-following device (step 540) is provided optionally, with the normal direction at each interface of adjustment Optical devices array.In the present embodiment, solar cell, light collecting element, Optical devices array, sun-following device can be respectively solar cell 110,210, light collecting element 220, Optical devices array 230, the sun-following device 240,310,410 of aforementioned each embodiment.

Because solar energy system of the present invention has Optical devices; Therefore; Can change the refractive direction of sunlight behind the interface by the kenel at the interface of adjusting Optical devices; But so that the plane of incidence (or incidence surface of light collecting element) of sunlight near vertical ground incident solar cell, and then the generating efficiency of lifting solar energy system.Because the present invention is a kenel of adjusting the interface with the mode of adjustment voltage difference; Therefore; Do not need effect that the motor of costliness and power consumption can reach solar tracking so that the photoelectric conversion efficiency optimization, and the kenel at rapid change interface that can be quite high and the refractive direction of sunlight behind the interface.In other words, solar energy system of the present invention is a kind of fixed solar energy system with solar tracking function.

Though the present invention discloses as above with preferred embodiment; So it is not in order to limit scope of the present invention; Those skilled in the art can do some changes and retouching under the premise without departing from the spirit and scope of the present invention, so protection scope of the present invention is to be as the criterion with claim of the present invention.

Claims

1. solar energy system comprises:

One solar cell; And

One Optical devices; Be disposed on this solar cell, these Optical devices have a cavity, and this cavity is equipped with an immiscible first fluid and one second fluid; Have an interface between this first fluid and this second fluid, the normal direction at this interface changes with the angle of incident ray.

2. solar energy system as claimed in claim 1; Wherein this interface is the surface that a voltage can be modulated; These Optical devices have relative two side walls, and these relative two side walls are positioned at relative two sides of this cavity, and these relative two side walls are two electrodes independent of each other; Have a voltage difference between this two side wall, and the normal direction at this interface can change with the change of this voltage difference.

3. solar energy system as claimed in claim 1 also comprises:

One light collecting element is disposed between this solar cell and this Optical devices, make incident ray through these Optical devices after this light collecting element focuses on this solar cell.

4. solar energy system as claimed in claim 3, wherein these Optical devices directly contact with this light collecting element or not directly contact separated from one another.

5. solar energy system as claimed in claim 3, wherein this light collecting element comprises the Optical devices array be made up of a plurality of Optical devices.

6. solar energy system as claimed in claim 1, it is a deflection structure.

7. solar energy system as claimed in claim 1 also comprises:

One sun-following device comprises:

One current measuring element couples this solar cell, detects an electric current of this solar cell and produces a current detection signal to represent the size of this electric current; And

One control element couples this current measuring element and this Optical devices, receiving this current detection signal and to control the normal direction at this interface of these Optical devices, and determines a final normal direction according to the corresponding current size of this normal direction gained of modulation.

8. solar energy system comprises:

One solar cell;

One light collecting element is disposed on this solar cell; And

One Optical devices array is disposed on this light collecting element, and this Optical devices array comprises a plurality of Optical devices; Respectively these Optical devices have a cavity and relative two side walls; And these relative two side walls are positioned at relative two sides of this cavity, and this cavity is equipped with an immiscible first fluid and one second fluid, have an interface between this first fluid and this second fluid; This interface is the surface that a voltage can be modulated; And these relative two side walls are two electrodes independent of each other, are suitable for existing a voltage difference between this two side wall, and the normal direction at this interface can change with the change of this voltage difference.

9. solar energy system as claimed in claim 8, wherein this light collecting element comprises the Optical devices array be made up of a plurality of Optical devices.

10. solar energy system as claimed in claim 8 also comprises:

One sun-following device is suitable for adjusting the normal direction at respectively this interface of this Optical devices array.